摘要当今，自动化控制系统已经在各行各业得到了广泛的应用和发展，而直流调速控制作为电气传动的主流在现代化生产中起着主要作用。本文主要研究直流调速系统，它主要由三部分组成，包括控制部分、功率部分、直流电动机。长期以来，直流电动机因其具有调节转速比较灵活、方法简单、易于大范围内平滑调速、控制性能好等特点，一直在传动领域占有统治地位。49624

微机技术的快速发展，在控制领域得到广泛应用。本文对基于微机控制的双闭环可逆直流PWM调速系统进行了较深入的研究，从直流调速系统原理出发，逐步建立了双闭环直流PWM调速系统的数学模型，用微机硬件和软件发展的最新成果，探讨一个将微机和电力拖动控制相结合的新的控制方法，研究工作在对控制对象全面回顾的基础上，重点对控制部分展开研究，它包括对实现控制所需要的硬件和软件的探讨，控制策略和控制算法的探讨等内容。在硬件方面充分利用微机外设接口丰富，运算速度快的特点，采取软件和硬件相结合的措施，实现对转速、电流双闭环调速系统的控制。

毕业论文关键词：直流可逆调速；数字触发；PWM；数字控制器

Abstract Today, auto control systems have been widely used and developed in every Walk of life, while DC speed regulation as the artery in the area of electric drive systems acts the main effect in modern is realization production. DC speed regulation is mainly made up of control unite, power unite and DC motor. For a long time, DC motor has possessed the main role the area of electric drive field because of its neatly adjust, easy method and smooth timing in wide rage, also, its control performance is very good.

With the rapid development of microcomputer, it is widely used in the control field. This paper researches reversible DC-PWM timing system with dual-converter and dual-closed-loop. Beginning with the theory of the DC timing system, this article has build up the mathematics model of the eversible DC-PWM timing system with a dual-converter and dual-closed-loop，discussing a new control method that combines microcomputer with DC-drive. Based on the overall review of control object, the emphasis is put on the part of control system, which includes the discussion of hardware and soft ware, control policy and algorithm, etc. In the hardware, it fully utilizes the advantage of microcomputer that are abundant interface and fast speed so as to realize the control of the system.

Keywords: reversible DC timing system；number touch off；Pulse-Width Modulation；Number controller

目  录

第一章 绪论 1

1.1 引言 1

1.2课题背景 2

1.3研究本课题的目的和意义 2

第二章 单闭环直流脉宽调速系统 4

2.1单闭环直流系统简介 4

2.1.1直流电动机调速方案4

2.1.2调速系统静态指标7

2.2开环系统机械特性和闭环系统静特性-8

2.3采用比例调节器的单闭环控制脉宽调速系统-9

2.4比例积分单闭环脉宽控制系统（无静差）11

2.5本章小结12

第三章 微机控制双闭环可逆直流PMW调速系统原理设计 13

3.1 转速、电流双闭环调速系统及其静特性 13

3.1.1问题的提出 13

3.1.2转速、电流双闭环调速系统的组成14

3.1.3稳态结构图和静特性-15

3.1.4各变量的稳态工作点和稳态参数计算-16